The South Korean drama sees 456 people competing in a series of games, with fatal consequences for the losers.
The nine-part series, which was watched by 111 million Netflix users in its first 28 days, tells the story of a group of people taking part in a series of children's playground games.
They are playing to walk away with 45.6 billion Korean won (£29m) if they win the series of six games.
If they lose, they die.
Mr Armstrong told BBC Radio Sussex said the interest in the Crawley version had been "amazing".
"We had to limit the entries, unfortunately. There are certainly not going to be 456 players in this one," he said.
Those who have registered to play will be told where the first game is to take place via a WhatsApp chat group.
"There will be no violence whatsoever. It will be adults playing children's games, but our version of British games. "
